check engine MERCEDES-BENZ C-Class COUPE 2017 CL205 Owner's Guide

For safety reasons, Mercedes-Benz recom-
mends only installing the following brake disks
and brake pads/linings:
Rbrake disks that havebeena pproved by
Mercedes-Benz
Rbrake pads/lining sthat hav ebeena pproved
by Mercedes-Benz or that are of an equivalent
standard of quality
Other brake disks or brake pads/lining scan
compromise the safety of your vehicle.
Alway sreplace al lbrake disks and brake pads/
linings on an axl eatthe sam etime. Always
install new brake pads/lining swhenr eplacing
brake disks.
The vehicle is equipped with lightweight brake
disks to which the wheel assembly with rim and
threaded connectio nismatched.
The use of brake disks other than those
approved by Mercedes-Benz can chang ethe
track width and is subject to approval ,ifappli-
cable.
Shock-typ eloads whe nhandling the brake
discs, such as whe nchanging wheels ,can lead
to areduction in comfortw hend riving with light-
weigh tbrake discs. Avoid shock-type loads on
the lightweight brake disks, particularly on the
brake plate.
Mercedes-Benz recommends that yo uonly use
brake fluid that has bee nspeciall yapproved for
your vehicle by Mercedes-Benz, or which corre-
sponds to an equivalent quality standard .Brake
fluid which has not bee napproved for
Mercedes-Benz vehicles or which is not of an
equivalent quality could affect your vehicle's
operating safety.
High-performance and ceramic brakes
(Mercedes AMG vehicles)
The AMG brake systems are designe dfor heavy
loads. Thism ay leadtonoisew henb raking. This
will depend on:
RSpeed
RBraking force
REnvironmental conditions, such as tempera-
ture and humidity
The wear of individua lcomponents of the brake
system, such as the brake pads/lining sorbrake
discs, depends on the individua ldriving style
and operating conditions.
For this reason, it is impossible to state amile-
ag ethat will be valid under al lcircumstances. An aggressive driving styl
ewilll ea dtoh ighw ear.
You can obtain more information on this from a
qualified specialist workshop.
New and replaced brake pads and discs only
reach thei roptimum braking effect afte rseveral
hundred kilometers of driving. Compensate for
this by applying greater force to the brake pedal.
Kee pthis in mind ,and adap tyou rd riving and
braking accordingly during this break-in period.
Excessive heavy braking results in correspond-
ingl yhighb rake wear. Observe the brake wear
warning lamp in the instrument cluster and note
any brake statu smessages in the multifunction
display. Especiall yfor hig hperformance driving,
it is important to maintain and hav ethe brake
system checked regularly.
Drivin gonw etroads
Hydroplaning
If water has accumulated to acertain depth on
the roads urface,there is adanger of hydro-
planing occurring, even if:
Ryo ud rive at low speeds.
Rthe tires hav eadequate treadd epth.
For this reason, in the event of heavy rai norin
conditions in which hydroplaning may occur,
yo um ustd rive in the following manner:
Rlower your speed.
Ravoid ruts.
Ravoid sudden steering movements.
Rbrake carefully.
Drivin gonfloodedroads
!Bearinm ind that vehicles traveling in front
or in the opposite directio ncreate waves. This
may cause the maximum permissibl ewater
depth to be exceeded.
Failure to observe these notes may result in
damag etothe engine, electricals ystems and
transmission.
If yo uhavetod rive on stretche sofroadonw hich
water has collected ,please bea rinmind that:
Rin the case of standing water, the water level
may be no higher than the lower edg eofthe
vehicle body
Ryo us hould drive no faster than at awalking
pace
Drivin gtips159
Drivin gand parking
Z

Rif the cameralens is dirtyoro bstructed
Observe the notes on cleaning
(
Ypage 296)
Rif the rear of your vehicle is damaged. In this
event, have the camer aposition and setting
checked at aqualified specialist workshop
The field of vision and other function softhe rear
view camer amay be restricted due to additional
accessories on the rear of the vehicle (e.g.
license plate holder,b icycle rack).
iThe rear view cameraisprotected fromr ain-
drops and dust by meansofaf lap. When the
rear view camer aisactivated, this flap opens.
The flap closes again when:
Ryou have finished the maneuveringp rocess
Ryou switchoff the engine
Ryou open the trunk
Observe the notes on cleaning (
Ypage 296).
For technical reasons, the flap may remain
open briefly after the rear view camer ahas
been deactivated.
Activating/deactivating th erearv iew
camera
XTo activate: make sure that the SmartKey is
in position 2in the ignition lock.
XMake sure that the Activation byRgearfunction is selected in the multimedia system
(see the separateo perating instructions).
XEngage reverse gear.
The rear view camer aflap opens. The multi-
media system shows the area behindt he vehi-
cle with guide lines.
The image fromt he rear view camer aisavail-
able throughout the maneuveringp rocess.
To deactivate: the rear view camer adeacti-
vate sify ou shift the transmission to Por after
drivingf orwards ashortd istance.
Multimedia display
The rear view camer amay show adistorted view
of obstacles, show the mincorrectly or not at all.
The rear view camer adoes not show object sin
the followingp ositions:
Rvery closetothe rear bumper
Runder the rear bumper
Rin clos erang eabove the handle on the trunk
lid
!Object snot at groundl evel may appear to
be further away than the yactually are, e.g.:
Rthe bumper of aparked vehicle
Rthe drawbar of atrailer
Rthe ball couplin gofatrailer tow hitch
Rthe rear section of an HGV
Ras lanted post
Use the guideline sonly for orientation.
Approach object snofurther than the bottom-
most guideline.
:Yellow guide line at adistanc eofapprox-
imately 13 ft (4. 0m)fromthe rear of the
vehicle
;Whiteg uide line without turning the steering
wheel, vehicle width including the exterior
mirrors (static)
=Yellow guide line for the vehicle width
including the exterior mirrors, for current
steeringw heel angle (dynamic)
?Yellow lane marking tires at current steering
wheel angle (dynamic)
AYellow guide line at adistanc eofapprox-
imately 3ft(1.0m)f romthe rear of the vehi-
cle
BVehicle center axle (marker assistance)
182Driving systems
Driving and parking

Display messagesPossible causes/consequences andMSolutions
The yellow!warning lamp lights up and th ered F (USAonly)
or ! (Canada only) indicator lamp flashes .
It is no tpossibl etoapply th eelectric parking brak emanually.
XShift th etransmission to position P.
XVisitaqualified specialist workshop .
$(USA
only)
J(C anada
only)
Check Brake Fluid
Level
There is no tenough brak efluidint hebrak efluid reservoir .
In addition ,the $ (USAonly) or J (Canada only) warning lamp
lights up in th einstrumen tcluste rand aw arning tone sounds.
GWARNIN G
The braking effec tmay be impaired.
There is ariskofana ccident.
XPull overand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions. Do no tcontinue driving
under any circumstances.
XSecur ethe vehicl eagainst rollin gaway (Ypage 152).
XConsult aqualified specialist workshop .
XDo notadd brak efluid .This does no tcorrect them alfunction .
#
CheckBrakePadWear
The brak epads/linings hav ereached their wear limit.
US Ao nly: th e$ red brak esystem warning lamp is lit while th e
engin eisrunning.
XVisit aqualified specialist workshop .
G
Inoperative
Oneorm orem ain features of th embrace system are malfunctioning .
XVisitaqualified specialist workshop .
Collision Preven‐tionAssist Plu sCurrently Unavaila‐ble See Operator' sManual
COLLISION PREVENTION ASSIST PLU Sistemporarily no toperational.
Possibl ecauses are:
Rther adar sensor system is temporarily inoperative, e.g. due to elec -
tromagneti cradiation emitted by nearby TV or radi ostation sor
other source sofelectromagneti cradiation .
Rthes ystem is outside th eoperating temperature range.
Rtheo n-bo ardv oltag eistoolow.
Whe nthe causes state dabov enol onger apply, th edisplay message
disappears.
COLLISION PREVENTION ASSIST PLU Sisoperational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 152).
XRestart th eengine.
Display messages22 5
On-boardc omputer andd isplays
Z

Display messagesPossible causes/consequences andMSolutions
Adaptive HighbeamAssist InoperativeAdaptive HighbeamAssistisf aulty.
XVisit aqualified specialist workshop .
Adaptive HighbeamAssist CurrentlyUnavailable SeeOperator'sManual
Adaptive Highbea mAssistisd eactivated and temporarily inoperative.
Possibl ecauses are:
Rthew indshield in th ecamera' sfield of vision is dirty.
Rvisibilit yisimpaire ddue to heav yrain ,sno worf og.
XClean th ewindshield.
If th esystem detects that th ecamera is full yoperational again ,the
Adaptive
HighbeamAssistNowAvailablemessage is displayed.
Adaptive Highbea mAssistiso perational again .
Engine
Display messagesPossible causes/consequences and MSolutions
+
CheckCoolantLevelSee Operator' sMan‐ual
The coolan tlevel is to olow.
!Avoid making lon gjou rneys wit htoo littl ecoolan tint heengin e
coolin gsystem. The engin ewill otherwise be damaged.
XAddc oolant, observing th ewarning note sbefore doin gso
(Ypage 290).
If you have to ad dcoolant frequently:
XContac taqualified specialist workshop and hav ethe engin ecooling
system checked.
?The fan motor is faulty.
XAt coolan ttem peratures belo w248‡(120 †), drive to the nearest
qualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in moun-
tainou sterrai nand stop-and-go traffic.
232Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
#
StopVehicl eSeeOperator' sManual
The battery is no longer bein gcharged and th ebattery charg elevel is
to ol ow.
Aw arning tone also sounds.
XPull ove rand stop th evehicl esafely and switch off th eengine, pay-
ing attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 152).
XObserv ethe instruction sinthe# See Operator' sManualdisplay message .
XConsultaqualified specialist workshop .
#
StopVehicl eLeaveEngine Runnin g
The battery charg elevel is to olow.
XPull ove rand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions. Do no tcontinue driving
under any circumstances.
XLeav ethe engin erunning.
XWait until th edisplay message disappear sbefore pullin gaway.
#
Start Engine SeeOperator' sManual
The engin eisswitched off and th ebattery charg elevel is to olow.
XSwitc hoff electrical consumer sthaty ou do no tneed, suc hasthe
rear window defroste rand interior lighting .
XLeavethe engin erunnin gfor afew minute sordrivealon gd istance.
The battery is bein gcharged.
4
CheckEngineOilAtNex tRefueling
The engin eoil level has dropped to th eminimum level.
Aw arning tone also sounds.
!Avoid lon gjou rneys wit htoo littl eengineo il. The engin ewill oth-
erwise be damaged.
XChec kthe oil level when next refueling, at th elatest (Ypage 289).
XIf necessary, add engin eoil(Ypage 289).
If th eengin eoil need stoppin gupm oreo ften:
XContac taqualified specialist workshop and hav ethe engin e
checked.
Information on approve dengineo ils can be obtained from aqualified
specialist workshop or on th eInterne tath ttp:// bevo.mercedes -
benz.com.
234Display messages
On-boardc omputer andd isplays

Display messagesPossible causes/consequences andMSolutions
4
Check Engine OilLevel (Add1quart)
The engin eoil level has dropped to th eminimum level.
!Avoid lon gjou rneys wit htoo littl eengineo il. The engin ewill oth-
erwise be damaged.
XChec kthe oil level when next refueling, at th elatest (Ypage 289).
XIf necessary, add engin eoil(Ypage 289).
If th eengin eoil need stoppin gupm oreo ften:
XContac taqualified specialist workshop and hav ethe engin e
checked.
Information on approve dengineo ils can be obtained from aqualified
specialist workshop or on th eInterne tath ttp:// bevo.mercedes -
benz.com.
4
Engine Oil LevelLow Sto pVehicl eTurnEngine Off
The engin eoil level is to olow. There is ariskofe ngined amage.
XPull ove rand stop th evehicl esafely and switch off th eengine, pay-
ing attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 152).
XChec kthe engin eoil level (Ypage 289).
XIf necessary, add engin eoil(Ypage 289).
8
Fue lLevel Low
The fuel level has dropped int othe reserv erange.
XRefue lattheneares tgas station .
CThere is only averys mall amount of fuel in th efuel tank.
XRefue lattheneares tgas station without fail .
8
Gas Cap Loose
The fuel filler cap is no tclosed correctl yorthefuel system is leaking .
XCheckthatthe fuel filler cap is correctl yclosed .
If th efuelfiller cap is not correctl yclosed :
XClosethe fuel filler cap .
If th efuelfiller cap is correctl yclosed :
XVisitaqualified specialist workshop .
Display messages235
On-boardc omputer andd isplays
Z

Display messagesPossible causes/consequences andMSolutions
DISTRONIC PLUSNowAvailableDISTRONI CPLUSiso perational again after having been temporarily
unavailable .You can no wreactivat eDISTR ONICPLUS(Ypage 162).
DISTRONIC PLU SCur‐rently UnavailableSee Operator' sMan‐ual
DISTRONI CPLUSist emporarily inoperative.
Steering Assis tand Stop&Go Pilo tare temporarily inoperative.
Possibl ecauses are:
Rther adar sensor system is temporarily inoperative, e.g. due to elec -
tromagneti cradiation emitted by nearby TV or radi ostation sor
other source sofelectromagneti cradiation .
Rthes ystem is outside th eoperating temperature range.
Rtheo n-bo ardv oltag eistoolow.
Aw arning tone also sounds.
Whe nthe causes state dabov enol onger apply, th edisplay message
disappears.
DISTRONI CPLUSiso perational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 152).
XRestart th eengine.
DISTRONICPLU SInop‐erativ eDISTRONI CPLUSisd efective.
The followin gmay hav ealso failed:
RBASP LUSw ithC ross-Traffic Assis t
RPRE-SAFE®Brake
RSteering Assis tand Stop&Go Pilo t
Aw arning tone also sounds.
XVisit aqualified specialist workshop .
DISTRONIC PLUSSus‐pendedYou hav edepressed th eaccelerato rpedal .DISTR ONICPLUSisn o
longer controllin gthe speed of th evehicle.
XRemove your foo tfromt heaccelerato rpedal .
DISTRONIC PLU S---mphAn activation condition for DISTRONI CPLUSisn otfulfilled .
XCheckthe activation condition sfor DISTRONI CPLUS(Ypage 162).
Display messages23 9
On-boardc omputer andd isplays
Z

Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
åNThe yellow ESP®OFF warning lamp is lit while the engine is running or the ECO
start/stop function is activated.
ESP
®is deactivated.
GWARNING
If ESP
®is switched off, ESP®is unable to stabilize the vehicle.
Further driving systems or driving safety systems are thus restricted, e.g. Active
Blind Spot Assist. The system does not perform braking actions.
There is an increased risk of skidding and an accident.
XReactivate ESP®.
In rare cases it may be better to deactivate ESP®:
Rall vehicles except Mercedes-AMG vehicles (Ypag e67)
RMercedes-AMG vehicles (Ypag e68)
Observe the important safety notes on ESP®(Ypag e67).
XAdapt you rdriving style to sui tthe road and weather conditions.
If ESP
®cannot be activated:
XDrive on carefully.
XContact aqualified specialist worksho pand have ESP®checked.
MNMercedes-AMG vehicles only:
The yellow SPORT handling mode warning lamp is lit while the engine is running.
SPORT handling mode is activated.
GWARNING
When SPORT handling mode is switched on, ESP
®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XOnly switch to SPORT handling mode in accordance with the conditions descri-
bed in the "Activating/deactivating ESP" section (Ypag e68).
Warning and indicator lamps in the instrument cluster251
On-board computer and displays
Z

Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
F!NF (USA only), !(Canada only): the red indicator lamp for the electric
parking brake flashes or is lit and/or the yellow warning lamp for the electric
parking brake is lit.
XObserve the additiona ldisplay messages in the multifunction display.
6N The red restraint system warning lamp is lit while the engine is running.
The restraint system is faulty.
GWARNING
The air bag sorEmergency Tensioning Devices may either be triggere duninten-
tionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
XObserve the additiona ldisplay messages in the multifunction display.
XDrive on carefully.
XContact aqualified specialist worksho pand have the restraint system checked.
For further information about the restraint system, see (
Ypag e41).
Engine
Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
;NThe yellow Check Engine warning lamp lights up while the engine is running.
There may be amalfunction, for example:
Rin the engine management
Rin the fuel injection system
Rin the exhaust system
Rin the ignitio nsystem (for vehicles with gasoline engines)
Rin the fuel system
The emission limi tvalues may be exceededa nd the engine may be in emergency
mode.
XVisi taq ualified specialist worksho pimmediately.
In some states, you must immediatel yvisit aqualified specialist worksho passoon
as the yellow Check Engine warning lamp lights up. This is due to the lega lrequire-
ments in effect in these states. If in doubt, check whethe rsuch lega lregulations
apply in the state in which you are currently driving.
8N The yellow reserve fuel warning lamp lights up while the engine is running.
The fuel leve lhas dropped into the reserve range.
XRefuel at the neares tgas station.
252Warning and indicator lamps in the instrument cluster
On-board computer and displays

Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
8NThe yellow reserve fuel warning lamp flashes while the vehicleisinm otion.
In addition, the ;Check Engine warning lamp may light up.
The fuel filler cap is not closed correctly or the fuel system is leaking.
XCheck that the fuel filler cap is correctly closed.
XIf the fuel filler cap is not correctly closed: close the fuel filler cap.
XIf the fuel filler cap is closed:visitaqualified specialist workshop.
?NThe red coolant warning lamp lights up while the engine is running and the
coolant temperature gauge is at the start of the scale.
The temperature sensor for the coolant temperature gage is defective.
The coolant temperature is no longer being monitored .There is arisk of engine
damage if the coolant temperature is too high.
XPul lover and stop the vehicles afelyand switch off the engine, paying attention
to road and traffic conditions. Do not continue driving under any circumstances.
XSecure the vehiclea gainst rolling away(Ypage152).
XConsult aqualified specialist workshop.
Warning and indicator lamps in the instrument cluster253
On-board computer and displays
Z